QRB1B-A014U25B Siemens Flame Sensor

Overview

The Siemens QRB1B-A014U25B is a photoresistive flame detector designed for the supervision of yellow-burning oil flames in conjunction with burner controls such as the LAL, LME7, LMO, LMV, and LOA series. This compact sensor is engineered to detect radiation in the visible light spectrum (maximum spectral sensitivity approximately 600 nm), making it ideal for intermittent burner operations in both heating and industrial combustion systems.

Features

• Increased sensitivity for precise supervision of yellow-burning oil flames
• Photoresistive sensing element with a resistance that decreases as light intensity increases
• Integrated soft plastic plug for simplified mounting on the burner via a hole with a lateral groove
• Durable red casing designed for easy identification of sensitivity levels
• Plug-in connection system for efficient installation and replacement

Specifications

• Model: QRB1B-A014U25B
• Sensitivity: Increased (indicated by red casing)
• Casing Length: 50 mm
• Visible Cable Length: 14 cm
• Stripped Length: 25 mm
• Protection Rating: IP40
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 20-35 g

Applications

• Supervision of yellow-burning oil flames in residential and industrial burners
• Used in combination with Siemens burner controls (LAL, LME7, LMO, LMV, and LOA)
• Suitable for burners requiring frontal or lateral (90 degree) illumination
• Ideal for HVAC and boiler systems requiring sensitive and stable flame detection